InitialAttempt.cs

interface IAuthorization
{
	String Item1 { get; set; }
	String Item2 { get; set; }
	String Item3 { get; set; }
}

public class App1Authorization
{
	String Item1 { get; set; }
	String Item2 { get; set; }
	String Item3 { get { return null; } set {/* Do Nothing */} }
}

public class UserAuthorizations
{
	public String UserName { get; set; }
	public int UserId { get; set; }
	public List<IAuthorization> Authorizations { get; set; }
}

public UserAuthorizations GetApp1Authorizations(int UserId)
{
	return (from u in _context.Users
		where u.WsuId == UserId
		select new UserAuthorizations
		{
			UserName = u.FullName,
			UserId = UserId,
			Authorizations = (from ca in _context.App1Authorizations
					  where ca.UserWsuId == UserId
					  select new App1Authorization
					  {
					  	Item1 = ca.Item1,
						Item2 = ca.Item2
					  }).ToList()
		}).Single();
}